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php str_replace 只匹配一次

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2016-05-25 17:08:271634browse

php str_replace 只匹配一次

用户可能是在找如何利用 php 的str_replace只替换目标字符串的内容一次,而不是全部替换。

function str_replace_once($needle, $replace, $haystack) {
    // Looks for the first occurence of $needle in $haystack
    // and replaces it with $replace.
    $pos = strpos($haystack, $needle);
    if ($pos === false) {
        // Nothing found
        return $haystack;
    }
    return substr_replace($haystack, $replace, $pos, strlen($needle));
}

                   

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